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joko |
1.1 |
## ------------------------------------------------------------------------ |
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## $Id: WebCache.pm,v 1.3 2003/06/25 23:37:04 joko Exp $ |
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## ------------------------------------------------------------------------ |
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## $Log: WebCache.pm,v $ |
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## ------------------------------------------------------------------------ |
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package POE::Component::ServiceRegistrar; |
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use strict; |
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use warnings; |
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use POE qw( Session ); |
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#use Data::Storage::Container; |
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use Data::Dumper; |
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sub new { |
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my $classname = shift; |
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my $self = {}; |
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bless $self, $classname; |
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$self->{config} = shift; |
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POE::Session->create( |
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object_states => [ |
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$self => [qw( _start _stop register_lease renew_lease remote_register )] |
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] |
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); |
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} |
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# This is not a POE method. It's a plain OO one. |
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sub debug { |
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my $self = shift; |
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my $msg = shift; |
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$msg ||= ''; |
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print STDERR __PACKAGE__ . ": " . $msg, "\n"; |
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} |
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sub _start { |
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my ( $self, $kernel, $heap ) = @_[ OBJECT, KERNEL, HEAP ]; |
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$self->debug("_start"); |
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# V1 - Announce ourselves as global singleton at Kernel side. |
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$kernel->alias_set("ServiceRegistrar"); |
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# V2 - Also announce to the IKC infrastructure component. |
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$kernel->post('IKC', 'publish', 'ServiceRegistrar', [qw( register_lease )]); |
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# tell IKC monitor to start up and intercept registration and renewal requests from client(s) |
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$kernel->post( IKC => 'monitor', '*' => { register => 'remote_register' }); |
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#$kernel->post( IKC => 'monitor', '*' => { renew => 'catch_event' }); |
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}; |
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sub _stop { |
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my ( $self, $kernel, $heap ) = @_[ OBJECT, KERNEL, HEAP ]; |
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$self->debug("_stop"); |
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# does this work? |
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$kernel->post( IKC => 'retract', 'ServiceRegistrar' => [qw( register_lease )]); |
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}; |
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sub register_lease { |
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my ( $self, $kernel, $heap, $sender ) = @_[ OBJECT, KERNEL, HEAP, SENDER ]; |
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$self->debug("register_lease"); |
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my $payload = $_[ARG0]; |
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print Dumper($payload); |
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#my $result = $heap->{STORAGE}->sendQuery($query); |
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#$kernel->post( $sender => handle_storage_result => $result ); |
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# publish new remote methods on the fly to service following renewal requests from client(s) |
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$kernel->post('IKC', 'publish', 'ServiceRegistrar', [qw( renew_lease )]); |
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# send response back to client session - does it actually work asynchronously? |
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$kernel->post($_[SENDER], 'response', 'REG_OK'); |
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}; |
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sub renew_lease { |
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my ( $self, $kernel, $heap, $sender ) = @_[ OBJECT, KERNEL, HEAP, SENDER ]; |
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my $from = $sender->[0]->{from}->{kernel}; |
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$self->debug("renew_lease: Lease renewal requested from '$from'."); |
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#$self->debug($sender->ID()); |
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#$self->debug($heap->{name}); |
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#print Dumper($sender); |
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#$self->debug($sender->[0]->{from}->{kernel}); |
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# postback value via rsvp-mechanism (see perldoc POE::Component::IKC::Responder) |
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return 'LEASE_OK2'; |
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} |
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sub remote_register { |
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my ( $self, $kernel, $heap, $sender ) = @_[ OBJECT, KERNEL, HEAP, SENDER ]; |
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#$self->debug("catch_event"); |
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my ($name, $real) = @_[ARG1, ARG2]; |
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print "- Remote kernel ", ($real ? '' : "alias "), "$name connected\n"; |
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$heap->{name} = $real if $real; |
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} |
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#------------------------------------------------------------------------------ |
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# This event keeps this POE kernel alive. |
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# (stolen from POE::Component::IKC::Server, but not used 'til now...) |
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sub waste_time |
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{ |
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my($kernel, $heap)=@_[KERNEL, HEAP]; |
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return if $heap->{'is a child'}; |
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unless($heap->{'been told we are parent'}) { |
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warn "$$: Telling everyone we are the parent\n"; |
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$heap->{'been told we are parent'}=1; |
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$kernel->signal($kernel, '__parent'); |
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} |
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if($heap->{'die'}) { |
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DEBUG and warn "$$: Orderly shutdown\n"; |
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} else { |
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$kernel->delay('waste_time', 60); |
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} |
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return; |
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} |
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1; |
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__END__ |
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